org.eclipse.linuxtools.lttng.ui.tests/stubs/org/eclipse/linuxtools/lttng/stubs/LTTngTraceStub.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Francois Chouinard (fchouinard@gmail.com) - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.lttng.stubs;
  14
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17 import java.io.RandomAccessFile;
  18
  19 import org.eclipse.linuxtools.lttng.event.LttngEvent;
  20 import org.eclipse.linuxtools.tmf.event.TmfEvent;
  21 import org.eclipse.linuxtools.tmf.parser.ITmfEventParser;
  22 import org.eclipse.linuxtools.tmf.trace.ITmfLocation;
  23 import org.eclipse.linuxtools.tmf.trace.TmfContext;
  24 import org.eclipse.linuxtools.tmf.trace.TmfLocation;
  25 import org.eclipse.linuxtools.tmf.trace.TmfTrace;
  26
  27 /**
  28  * <b><u>LTTngTraceStub</u></b>
  29  * <p>
  30  * Dummy test trace. Use in conjunction with LTTngEventParserStub.
  31  */
  32 public class LTTngTraceStub extends TmfTrace<LttngEvent> {
  33
  34     // ========================================================================
  35     // Attributes
  36     // ========================================================================
  37
  38     // The actual stream
  39     private final RandomAccessFile fTrace;
  40
  41     // The associated event parser
  42     private final ITmfEventParser fParser;
  43
  44     // ========================================================================
  45     // Constructors
  46     // ========================================================================
  47
  48     /**
  49      * @param filename
  50      * @param parser
  51      * @throws FileNotFoundException
  52      */
  53     public LTTngTraceStub(String filename) throws FileNotFoundException {
  54         this(filename, DEFAULT_CACHE_SIZE);
  55     }
  56
  57     /**
  58      * @param filename
  59      * @param parser
  60      * @param cacheSize
  61      * @throws FileNotFoundException
  62      */
  63     public LTTngTraceStub(String filename, int cacheSize) throws FileNotFoundException {
  64         super(LttngEvent.class, filename, cacheSize);
  65         fTrace = new RandomAccessFile(filename, "r");
  66         fParser = new LTTngEventParserStub();
  67         indexTrace(true);
  68     }
  69
  70     // ========================================================================
  71     // Accessors
  72     // ========================================================================
  73
  74     public RandomAccessFile getStream() {
  75         return fTrace;
  76     }
  77
  78     // ========================================================================
  79     // Operators
  80     // ========================================================================
  81
  82     /* (non-Javadoc)
  83      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#seekLocation(java.lang.Object)
  84      */
  85         @Override
  86         @SuppressWarnings("unchecked")
  87         public TmfContext seekLocation(ITmfLocation<?> location) {
  88         TmfContext context = null;
  89         try {
  90                 synchronized(fTrace) {
  91                         fTrace.seek((location != null) ? ((TmfLocation<Long>) location).getLocation() : 0);
  92                         context = new TmfContext(getCurrentLocation(), 0);
  93 //                      TmfTraceContext context2 = new TmfTraceContext(getCurrentLocation(), 0);
  94 //                      TmfEvent event = parseEvent(context2);
  95 //                      context.setTimestamp(event.getTimestamp());
  96                 }
  97         } catch (IOException e) {
  98                 // TODO Auto-generated catch block
  99                 e.printStackTrace();
 100         }
 101         return context;
 102     }
 103
 104     /* (non-Javadoc)
 105      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfStreamLocator#getCurrentLocation()
 106      */
 107     @Override
 108         public ITmfLocation<?> getCurrentLocation() {
 109         try {
 110                 return new TmfLocation<Long>(fTrace.getFilePointer());
 111         } catch (IOException e) {
 112                 // TODO Auto-generated catch block
 113                 e.printStackTrace();
 114         }
 115         return null;
 116     }
 117
 118         /* (non-Javadoc)
 119          * @see org.eclipse.linuxtools.tmf.trace.ITmfTrace#parseEvent()
 120          */
 121         @Override
 122         public TmfEvent parseEvent(TmfContext context) {
 123         try {
 124                         // paserNextEvent updates the context
 125                         TmfEvent event = fParser.parseNextEvent(this, context);
 126 //                      if (event != null) {
 127 //                              context.setTimestamp(event.getTimestamp());
 128 //                      }
 129                 return event;
 130         }
 131         catch (IOException e) {
 132                 e.printStackTrace();
 133         }
 134         return null;
 135         }
 136
 137         /* (non-Javadoc)
 138          * @see java.lang.Object#toString()
 139          */
 140         @Override
 141         public String toString() {
 142                 return "[LTTngTraceStub]";
 143         }
 144
 145 //    // ========================================================================
 146 //    // Helper functions
 147 //    // ========================================================================
 148 //
 149 //    /* (non-Javadoc)
 150 //     * @see org.eclipse.linuxtools.tmf.eventlog.ITmfEventStream#getAttributes()
 151 //     */
 152 //    public Map<String, Object> getAttributes() {
 153 //        // TODO Auto-generated method stub
 154 //        return null;
 155 //    }
 156
 157 }